Ooh, that is a fairly large amount of land! I guess it is 'farming' since you've got whole fields dedicated to crops. It doesn't have to be commercial farming - I mean, a hundred plus years ago, most non-urban areas had farms that were largely for their own produce (with some exchange).

Would you consider, say, running animals across the rocky section? Chickens or maybe sheep/goats? I mean, it would require fencing, which is no small thing, and also daily management (which may not be something that you want to do). Just a thought for productivity on a section of land that can't necessarily be planted out.

I was tempted to get a drone a few weeks back (luckily for my bank account, I didn't) - they seem like quite a lot of fun, and great for seeing land like that!